I'm trying to create a template tag so I can find out which group the current user belongs to. I have the same set up in another project but that one is working, but this one does not. This is what I have:
Project structure:
- root_directory
-- myproject
--- home
---- templatetags
----- __init__.py
----- custom_tags.py
---- __init__.py
---- urls.py
---- ...
--- myproject
---- settings.py
---- ...
settings.py:
INSTALLED_APPS = [
.....
'home.templatetags',
]
custom_tags.py:
from django import template
register = template.Library()
@register.filter
def has_group(user, group_name):
return user.objects.filter(group_name=group_name).
home_base.html:
{% extends 'navbar.html' %}
{% block content %}
{% load custom_tags %}
{% endblock %}
Traceback:
Internal Server Error: /
Traceback (most recent call last):
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\defaulttags.py", line 1021, in find_library
return parser.libraries[name]
KeyError: 'custom_tags'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\core\handlers\exception.py", line 34, in inner
response = get_response(request)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\core\handlers\base.py", line 115, in _get_response
response = self.process_exception_by_middleware(e, request)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\core\handlers\base.py", line 113, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\views\generic\base.py", line 71, in view
return self.dispatch(request, *args, **kwargs)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\views\generic\base.py", line 97, in dispatch
return handler(request, *args, **kwargs)
File "D:\Projects\1-2-1\monthlymeeting\home\views.py", line 9, in get
return render(request, self.template_name, {'entry': 1})
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\shortcuts.py", line 36, in render
content = loader.render_to_string(template_name, context, request, using=using)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\loader.py", line 61, in render_to_string
template = get_template(template_name, using=using)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\loader.py", line 15, in get_template
return engine.get_template(template_name)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\backends\django.py", line 34, in get_template
return Template(self.engine.get_template(template_name), self)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\engine.py", line 143, in get_template
template, origin = self.find_template(template_name)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\engine.py", line 125, in find_template
template = loader.get_template(name, skip=skip)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\loaders\base.py", line 30, in get_template
contents, origin, origin.template_name, self.engine,
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\base.py", line 156, in __init__
self.nodelist = self.compile_nodelist()
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\base.py", line 194, in compile_nodelist
return parser.parse()
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\base.py", line 478, in parse
raise self.error(token, e)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\base.py", line 476, in parse
compiled_result = compile_func(self, token)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\loader_tags.py", line 266, in do_extends
nodelist = parser.parse()
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\base.py", line 478, in parse
raise self.error(token, e)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\base.py", line 476, in parse
compiled_result = compile_func(self, token)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\loader_tags.py", line 209, in do_block
nodelist = parser.parse(('endblock',))
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\base.py", line 478, in parse
raise self.error(token, e)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\base.py", line 476, in parse
compiled_result = compile_func(self, token)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\defaulttags.py", line 1078, in load
lib = find_library(parser, name)
File "D:\Projects\1-2-1\monthlymeeting\venv\lib\site-packages\django\template\defaulttags.py", line 1025, in find_library
name, "\n".join(sorted(parser.libraries)),
django.template.exceptions.TemplateSyntaxError: 'custom_tags' is not a registered tag library. Must be one of:
admin_list
admin_modify
admin_static
admin_urls
cache
comments
i18n
l10n
log
static
staticfiles
tz
I have tried the following:
home.templatetags import custom_tags and it loaded without any errors.The same structure is working for another project that I have. I don't know what is going on. The only difference is that this project is Django 2.2.4 and the other one is 2.2.3. And this project has an extra app django-contrib-comments.
I have been trying to fix this and I have exhausted all the methods I could find online.
You need to {% load %} your custom tags in your template.
INSTALLED_APPS as that's only for apps (but your app should definitely be in there, e.g. home){% load custom_tags %} at the top of the templates using these tags.